<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Animate a series of images</title>
    <meta
      name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no"
    />
    <script src="../../lib/mapbox-gl.js"></script>
    <link href="../../lib/mapbox-gl.css" rel="stylesheet" />
    <script src="../../lib/axios.min.js"></script>
    <style>
      body {
        margin: 0;
        padding: 0;
      }
      #map {
        position: absolute;
        top: 0;
        bottom: 0;
        width: 100%;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>
      let baseDataUrl = `http://${localStorage.getItem(
        "host"
      )}/mapbox-gl-js-offline-examples`;
      axios
        .get(
          baseDataUrl +
            `/resources/styles/${localStorage.getItem(
              "mbtilesStylesName"
            )}.json`
        )
        .then((res) => {
          let data = res.data;
          initMap(data);
        })
        .catch((err) => {
          console.error(err);
        });

      function initMap(style) {
        let map = new mapboxgl.Map({
          container: "map",
          maxZoom: 5.99,
          minZoom: 4,
          zoom: 5,
          center: [-75.789, 41.874],
          style: style,
        });
        var frameCount = 5;
        var currentImage = 0;

        function getPath() {
          return (
            baseDataUrl + "/data/images/radar/radar" + currentImage + ".gif"
          );
        }

        map.on("load", function () {
          map.addSource("radar", {
            type: "image",
            url: getPath(),
            coordinates: [
              [-80.425, 46.437],
              [-71.516, 46.437],
              [-71.516, 37.936],
              [-80.425, 37.936],
            ],
          });
          map.addLayer({
            id: "radar-layer",
            type: "raster",
            source: "radar",
            paint: {
              "raster-fade-duration": 0,
            },
          });

          setInterval(function () {
            currentImage = (currentImage + 1) % frameCount;
            map.getSource("radar").updateImage({ url: getPath() });
          }, 200);
        });
      }
    </script>
  </body>
</html>
